P2C2: Testing Interpretations of the Oxygen Isotopic Composition of Asian Cave Calcite at Abrupt, Millennial, and Orbital Timescales

该项目的总体研究目标是根据先前构建的64万年长的高分辨率洞穴方解石氧同位素组成记录进一步探索亚洲季风，该记录来自目前受亚洲季风降雨影响的中国地区。 该项目特别试图研究与亚洲季风有关的几个问题，以更好地理解导致亚洲季风降雨突然、千年尺度和轨道尺度变化的机制，通过以下问题：（1）亚洲各地发生了降雨变化的推断;（2）副热带急流位置的变化在多大程度上影响了西藏以东的亚洲季风降雨;（3）青藏高原北部和西部中亚部分地区冬、夏季降水变化引起的气候变化。对这些问题的回答旨在了解导致亚洲季风降雨量突然、千年尺度和轨道尺度变化的机制。潜在的更广泛影响包括更好地了解亚洲季风，与中国科学家进行对美国和中国互利的国际合作，支持一个岗位，该奖项反映了NSF的法定使命，并通过使用基金会的知识价值和更广泛的影响进行评估，被认为值得支持审查标准。

The general research aim of this project is to further explore the Asian Monsoon from a previously constructed 640,000-year long, high-resolution record of the oxygen isotopic composition of cave calcite from the region of China currently affected by Asian monsoon rainfall. The project specifically seeks to examine several issues related to the Asian monsoon to better understand the mechanisms that cause abrupt, millennial-scale, and orbital-scale changes in Asian Monsoon rainfall through questions such as: (1) where across Asia have inferred changes in rainfall taken place; (2) to what extent have changes in the position of the sub-tropical jet affected Asian monsoon rainfall east of Tibet; and (3) were inferred changes in climate for portions of Central Asia north and west of the Tibetan Plateau caused by changes in winter or summer precipitation. Answers to these questions aim to understand the mechanisms that cause abrupt, millennial-scale, and orbital-scale changes in Asian Monsoon rainfall.The potential Broader Impacts include a better understanding of the Asian Monsoon, international collaboration with Chinese scientists of mutual benefit to the United States and China, and support for a post-doctoral scholar.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.